EP2120465B1 - Procédé, entité et système pour effectuer un transfert d'adresse de réseau - Google Patents

Procédé, entité et système pour effectuer un transfert d'adresse de réseau Download PDF

Info

Publication number
EP2120465B1
EP2120465B1 EP08757722.7A EP08757722A EP2120465B1 EP 2120465 B1 EP2120465 B1 EP 2120465B1 EP 08757722 A EP08757722 A EP 08757722A EP 2120465 B1 EP2120465 B1 EP 2120465B1
Authority
EP
European Patent Office
Prior art keywords
entity
address
local domain
message
spdf
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP08757722.7A
Other languages
German (de)
English (en)
Other versions
EP2120465A4 (fr
EP2120465A1 (fr
Inventor
Ting Zou
Zhenjian Zheng
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=40155908&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2120465(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of EP2120465A1 publication Critical patent/EP2120465A1/fr
Publication of EP2120465A4 publication Critical patent/EP2120465A4/fr
Application granted granted Critical
Publication of EP2120465B1 publication Critical patent/EP2120465B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/09—Mapping addresses
    • H04L61/25—Mapping addresses of the same type
    • H04L61/2503—Translation of Internet protocol [IP] addresses
    • H04L61/256—NAT traversal
    • H04L61/2564—NAT traversal for a higher-layer protocol, e.g. for session initiation protocol [SIP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/09—Mapping addresses
    • H04L61/25—Mapping addresses of the same type
    • H04L61/2503—Translation of Internet protocol [IP] addresses
    • H04L61/256—NAT traversal
    • H04L61/2567—NAT traversal for reachability, e.g. inquiring the address of a correspondent behind a NAT server
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/09—Mapping addresses
    • H04L61/25—Mapping addresses of the same type
    • H04L61/2503—Translation of Internet protocol [IP] addresses
    • H04L61/256—NAT traversal
    • H04L61/2582—NAT traversal through control of the NAT server, e.g. using universal plug and play [UPnP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/08—Access security
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/10—Network architectures or network communication protocols for network security for controlling access to devices or network resources
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/1016—IP multimedia subsystem [IMS]

Definitions

  • the present invention relates to communication technology, and more particularly to a method, an entity, and a system for realizing network address translation (NAT).
  • NAT network address translation
  • Ethernet and end to end Ethernet techniques enjoy high cognition among operators and users in enterprises and public institutions.
  • the Ethernet technique is one of the main techniques for constructing triple play and Metropolitan Area Network (MAN) in the future, and Ethernet services may be developed dramatically in the future market.
  • MAN Metropolitan Area Network
  • next generation network (a packet network architecture of ETSI TISPAN)
  • a resource admission control subsystem (RACS) is introduced between an application layer and a transport layer and is responsible for uniform management of bearer network resources, and providing policy-based control, including QoS and network address translation (NAT) of the bearer network that all need to be accessed and controlled via the RACS.
  • the RACS architecture defined in the NGN is shown in FIG. 1 .
  • the RACS mainly includes a service-based policy decision function (SPDF) entity and an access-resource admission control function (A-RACF).
  • SPDF service-based policy decision function
  • A-RACF access-resource admission control function
  • FIG. 1 demonstrate relations and interfaces between relevant functional entities and the RACS architecture.
  • An application function (AF) entity interacts with the SPDF entity via a Gq' interface, and transmits information about session services.
  • the AF entity may be specifically a proxy-call session control function (P-CSCF) or an interconnect border control function (IBCF).
  • a border gateway function (BGF) and a resource control enforcement function (RCEF) are policy enforcement points (PEPs) on the transport layer.
  • the SPDF entity mainly interacts with the BGF, so as to instruct the BGF to implement QoS control policy and/or NAT control.
  • the NAT solves the problem about address conflict by substituting an unregistered address written in an IP packet with a legal and registered IP address. That is, internal addresses are used in an internal network, and the NAT translates the internal addresses into legal IP addresses for being used in the Internet. During the NAT, the addresses in the IP packet are substituted by legal IP addresses, so as to enable plenty of internal hosts to access the Internet via a few IP addresses.
  • the SPDF entity cannot distinguish a direction of a current session description protocol (SDP), and thus cannot perform an NAT control.
  • ECC Electronic Communication Committee
  • US 2006/0013192 A1 discloses a UE (User Equipment) (IP1) 10 establishes a communication via SIP (Session Initiation Protocol) with a CN (Correspondent Node) (IP3) 30.
  • IP1 User Equipment
  • IP3 Correspondent Node
  • IP2 Network-server PEP (Performance Enhancement Proxy)
  • IP2 Performance Enhancement Proxy
  • SDP Session Description Protocol
  • the UE specifies PEP information in the "f” field or "f” fields, the "f” fields comprise a direction filed which indicates the direction of the media flow, and are used to create the appropriate pinholes in the firewall.
  • the present invention is directed to a method, an entity, and a system for realizing network address translation (NAT), so as to solve the problem in the prior art that a service-based policy decision function (SPDF) entity cannot distinguish a direction of a current session description protocol (SDP) and thus cannot perform an NAT control.
  • SPDF service-based policy decision function
  • the SPDF entity is enabled to distinguish an uplink direction or a downlink direction of the message, in which the uplink direction is, for example, from an access side to a core side or from a local core side to an opposite core side, or the downlink direction is, for example, from the core side to the access side or from the opposite core side to the local core side, so as to realize an NAT control.
  • a message receiver by extending an interface between two entities and adding a field indicating a signaling direction in a message of the interface, in which the field indicating the signaling direction carries the signaling direction information, a message receiver is enabled to rapidly and explicitly identify the signaling direction according to the signaling direction information carried in the field indicating the signaling direction, so as to realize an NAT control and other operations.
  • the two entities may be an AF entity and an SPDF entity.
  • two entities, AF entity and SPDF entity, in the IMS are taken as an example for illustration, in which a Session Initiation Protocol (SIP) is, for example, adopted between the two entities.
  • SIP Session Initiation Protocol
  • the SPDF entity is enabled to distinguish an uplink direction or a downlink direction of the SDP, so as to realize an NAT control.
  • AVP SDP Direction attribute-value pair
  • SDP Direction AVP indicating the SDP direction is added at the interface Gq' between the AF entity and the SPDF entity, and the AAR message is defined as follows:
  • [SDP Direction] is corresponding to the SDP Direction AVP, and a format of the SDP Direction AVP may be a 32-bit integer.
  • the SDP Direction AVP may be defined as follows:
  • the SDP Direction AVP is applicable to an NAT control and/or QoS resource reservation scenario.
  • the present invention provides a method for realizing an NAT control by using an SDP direction.
  • a method for realizing an NAT control by a calling party is shown, in which an IBCF networking scenario does not exist, the AF entity is specifically a P-CSCF, and the calling party is set to be a user entity A, that is, UE A.
  • the method mainly includes the following steps.
  • Step 1 a P-CSCF A receives an SDP offer message (offering an SDP message configuration) sent from the UE A.
  • the SDP offer message may be carried in a message such as an INVITE request, and include a group of media streams and codes expected to be used by a message sender (the UE A at an access end), an IP address and a port number through which a message expected to be received by the message sender, and an IP address of the access end.
  • the SDP offer message may include an IP address and a port number through which a message (for example, a media stream) expected to be received.
  • the message may carry a media address A1, an SDP Direction (INNER_TO_OUTER(0): entering an IMS core domain), and an IP address of the UE A, in which "entering the IMS core domain" indicates a direction from the access side to the core side.
  • the media address serves as a destination address of the message for the UE A side, and serves as a source address of the message for the core-network side.
  • Step 2 the P-CSCF A obtains the media address A1, the SDP Direction (INNER_TO_OUTER(0): entering the IMS core domain), and the IP address of the UE A from the received SDP offer message, and then sends an AAR message to an SPDF A.
  • the content carried by the AAR message may be obtained with reference to the above definition of the AAR message.
  • Step 3 after receiving the AAR message, the SPDF A searches for a local route according to the IP address of the UE A, obtains an address of a C-BGF A (a core-BGF corresponding to the UE A side) corresponding to the IP address of the UE A, and obtains a value of the SDP Direction carried in the AAR message, in which the value is INNER_TO_OUTER(0), so that the SPDF A determines that it requires to apply for an uplink port address of a media stream (that is, a core-side address). Therefore, the SPDF A sends an ADD Termination (a local domain address request) message to the C-BGF A, and applies for an allocation of an uplink port address of a media stream.
  • ADD Termination a local domain address request
  • the ADD Termination message carries the media address A1 of the SDP offer message and an application domain indication (indicating that it applies for an access-side local domain address or a core-side local domain address).
  • Step 4 after receiving the ADD Termination message, the C-BGF A applies for an uplink-port core-side local domain address A3 according to the media address A1 and the application domain indication in the ADD Termination message, and returns the applied address A3 to the SPDF A via a Reply message.
  • Step 5 the SPDF A returns the address A3 to the P-CSCF A via an AA-Answer (AAA) message.
  • AAA AA-Answer
  • Step 6 the P-CSCF A substitutes the original address A 1 of the SDP by the address A3 in the AAA message, and forwards the SDP offer message to a called party.
  • the first embodiment describes an initial creating process of media mapping for the calling party.
  • the P-CSCF carries a value of the SDP Direction in an AAR message, and the SPDF entity is enabled to determine whether the message is sent to a core side or an access side, so as to request and obtain a local domain address.
  • the SPDF entity notifies the P-CSCF about the local domain address, and the P-CSCF forwards the message according to the local domain address, thereby realizing an NAT control of the calling party.
  • the present invention provides a method for realizing an NAT control by using an SDP direction.
  • a method of realizing an NAT control by a called party is shown, in which an IBCF networking scenario does not exist, the AF entity is specifically a P-CSCF, and the called party is set to be a user entity B, that is, UE B.
  • the method mainly includes the following steps.
  • Step 1 a P-CSCF B receives an SDP offer message carrying a media address B4.
  • the SDP offer message may be carried in a message such as an INVITE request, and include a group of media streams and codes expected to be used by a message sender, an IP address and a port number through which a message expected to be received by the message sender, and an IP address of an access end.
  • the message may carry the media address B4, an SDP Direction (OUTER _TO_ INNER (1): exiting an IMS core network), and an IP address of the UE B, in which "exiting the IMS core network" indicates a direction from a core side to an access side.
  • the media address serves as a destination address of the message for the core-network side, and serves as a source address of the message for the UE B side.
  • Step 2 the P-CSCF B obtains the media address B4, the SDP Direction (OUTER _ _TO_ INNER (1): exiting the IMS core network), and the IP address of the UE B from the received SDP offer message, and then sends an AAR message to an SPDF B.
  • Step 3 after receiving the AAR message, the SPDF B searches for a local route according to the IP address of the UE B, obtains an address of a C-BGF B (a core-BGF corresponding to the UE B side), and obtains a value of the SDP Direction carried in the AAR message, in which the value of the SDP Direction is OUTER _TO_ INNER (1), so that the SPDF B determines that it requires to apply for a downlink port address (that is, an access-side address) of a media stream. Therefore, the SPDF B sends an ADD Termination message to the C-BGF B, and applies for an allocation of a downlink port address of a media stream.
  • the ADD Termination message carries the media address B4 of the SDP offer message and an application domain indication (indicating it applies for an access-side local domain address or a core-side local domain address).
  • Step 4 the C-BGF B applies for a downlink-port access-side local domain address B2 according to the media address B4 and the application domain indication in the ADD Termination message, and returns the applied address B2 to the SPDF B via a Reply message.
  • Step 5 the SPDF B returns the address B2 to the P-CSCF B via an AAA message.
  • Step 6 the P-CSCF B substitutes the original address B4 of the SDP by the address B2 in the AAA message, and forwards the SDP offer message to the access-side UE B.
  • the second embodiment describes an initial creating process of media mapping for the called party.
  • the P-CSCF carries the SDP Direction in an AAR message, so that the SPDF entity is enabled to determine whether the message is sent to a core side or an access side, so as to request and obtain a local domain address.
  • the SPDF entity notifies the P-CSCF about the local domain address, and the P-CSCF forwards the message according to the local domain address, thereby realizing an NAT control of the called party.
  • the P-CSCF firstly forwards a corresponding message to a serving-CSCF (S-CSCF), and the S-CSCF forwards the message to the IBCF.
  • S-CSCF serving-CSCF
  • the IBCF sends a message carrying an SDP Direction to a local SPDF AA or SPDF BB connected to the IBCF, and then the SPDF AA or SPDF BB interacts with a corresponding interconnect-BGF (I-BGF) to obtain a local address.
  • I-BGF interconnect-BGF
  • the SPDF AA or SPDF BB notifies the IBCF about the local address, and then the IBCF forwards the message according to the local address, so as to realize an NAT control.
  • a corresponding process of realizing an NAT control at a calling party in the case of IBCF networking is shown in FIG. 5
  • a corresponding process of realizing an NAT control at a called party in the case of IBCF networking is shown in FIG. 6 , so that the detailed processes thereof are not given herein again.
  • FIG. 7 is a structural view of the system.
  • the system includes a UE, an AF entity, and an SPDF entity.
  • the AF entity is adapted to receive a message sent from the UE, determine a signaling direction according to the message, and send an AAR message to the SPDF entity where the AAR message carries signaling direction information indicating the signaling direction.
  • the AF entity is also adapted to receive a local domain address corresponding to the message sent from the SPDF entity, and forward the message according to the local domain address.
  • the AF entity at least includes a signaling direction indication module, an NAT module, and a message forwarding module.
  • the signaling direction indication module is adapted to receive a message sent from the UE, determine a signaling direction according to the message, carry the signaling direction information in an AAR message, and send the AAR message.
  • the NAT module is adapted to perform substitutions between an access-side local domain address/local-core-s ide address and a corre-side local domain address/opposite-core-side address (that is, substitutions between an access-side local domain address and a core-side local domain address or between a local-core-side address and an opposite-core-side address) according to a local domain address obtained and sent by the SPDF entity.
  • the message forwarding module is adapted to forward the message according to the address obtained by the NAT module after performing the address substitution.
  • the AF entity may be a P-CSCF or an IBCF.
  • the SPDF entity is adapted to receive the AAR message carrying the signaling direction sent from the AF entity, and realize an NAT control according to the signaling direction.
  • the SPDF entity at least includes a message acquisition module and an NAT control module.
  • the message acquisition module is adapted to receive the AAR message carrying the signaling direction information sent from the AF entity.
  • the NAT control module is adapted to realize an NAT control according to the signaling direction information.
  • the NAT control mainly includes determining a required local domain address according to the signaling direction, and sending the address to the AF entity.
  • a method of determining a signaling direction when the SIP is adopted in the interworking between the IMS network and other networks is mainly introduced, and the method is also applicable to the determination of a signaling direction in the case of interworking between other networks.
  • the SPDF entity by extending an interface between the AF entity and the SPDF entity and adding an SDP Direction AVP indicating the signaling direction in the AAR message, the SPDF entity is enabled to distinguish an uplink direction or a downlink direction of the SDP, so as to realize an NAT control.
  • the SPDF entity is enabled to distinguish the current direction of the SDP is from an access side/local core side to a core side/opposite core side or from the core side/opposite core side to the access side/local core side, so as to realize an NAT control.
  • the direction from the access side/local core side to the core side/opposite core side indicates a direction from the access side to the core side or from the local core side to the opposite core side.
  • the direction from the core side/opposite core side to the access side/local core side indicates a direction from the core side to the access side or from the opposite core side to the local core side.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Mobile Radio Communication Systems (AREA)

Claims (6)

  1. Procédé de mise en oeuvre d'une conversion d'adresse réseau, NAT (Network Address Translation), dans le cas où un protocole d'ouverture de session, SIP (Session Initiation Protocol), est adopté dans l'interfonctionnement entre un sous-système multimédia IP, IMS (IP Multimedia Subsystem), et un autre réseau, comprenant :
    la réception (1), par une entité à fonction d'application, AF (Application Function),
    d'un message d'offre de protocole de description de session, SDP (Session Description Protocol), acheminant des informations de direction de signalisation lorsqu'un flux de trafic contient un flux multimédia de liaison montante et un flux multimédia de liaison descendante, dans lequel la liaison montante indique une direction allant d'un côté accès à un côté coeur de l'IMS, et la liaison descendante indique une direction allant du côté coeur de l'IMS au côté accès ;
    la détermination (2), par l'entité AF, d'une direction de signalisation conformément aux informations de direction de signalisation ;
    l'envoi (2), par l'entité AF, d'un message de demande d'autorisation d'accès, AAR (Access Authorization Request), à une entité à fonction de décision de politique à base de service, SPDF (Service-based Policy Decision Function), dans lequel le message AAR achemine des informations de direction de signalisation indiquant la direction de signalisation ;
    la réception (5), par l'entité AF, d'une adresse de domaine local correspondant à la direction de signalisation en provenance de l'entité SPDF, dans lequel l'adresse de domaine local est une adresse de domaine local du côté coeur de port de liaison montante si la direction de signalisation est la liaison montante, ou bien l'adresse de domaine local est une adresse de domaine local du côté accès au port de liaison descendante si la direction de signalisation est la liaison descendante ; et
    l'envoi (6), par l'entité AF, du message d'offre SDP conformément à l'adresse de domaine local correspondant à la direction de signalisation ; et
    l'entité AF est une fonction de contrôle de session d'appel de mandataire, P-CSCF (Proxy-Call Session Control Function).
  2. Procédé selon la revendication 1, comprenant en outre :
    l'obtention (3), par l'entité SPDF, des informations de direction de signalisation à partir du message AAR envoyé par l'entité AF, l'obtention (4) de l'adresse de domaine local correspondante conformément aux informations de direction de signalisation, et l'envoi (5) de l'adresse de domaine local obtenue à l'entité AF.
  3. Procédé selon la revendication 2, dans lequel le message d'offre SDP reçu par l'entité AF comprend en outre :
    une adresse multimédia, les informations de direction de signalisation indiquant la direction de signalisation et une adresse IP d'une extrémité d'accès.
  4. Procédé selon la revendication 3, dans lequel l'obtention, par l'entité SPDF, de l'adresse de domaine local correspondante conformément à la direction de signalisation comprend en outre :
    la détermination, par l'entité SPDF, d'une entité à fonction de passerelle frontière,
    BGF (Border Gateway Function), correspondante conformément à l'adresse IP de l'extrémité d'accès, et la détermination de l'adresse de domaine local requise conformément à la direction de signalisation ; et
    la demande et l'obtention, par l'entité SPDF, de l'adresse de domaine local en provenance de l'entité BGF correspondante.
  5. Procédé selon la revendication 4, dans lequel la demande et l'obtention, par l'entité SPDF, de l'adresse de domaine local en provenance de l'entité BGF correspondante comprend en outre :
    l'envoi, par l'entité SPDF, d'un message de demande d'adresse de domaine local acheminant l'adresse multimédia et une indication de domaine d'application à l'entité BGF ; et
    la demande, par l'entité BGF, de l'adresse de domaine local correspondante conformément au message de demande, et le renvoi de l'adresse demandée à l'entité SPDF.
  6. Procédé selon la revendication 3 ou 4, dans lequel l'envoi, par l'entité AF, du message d'offre SDP conformément à l'adresse de domaine local comprend en outre :
    la substitution, par l'entité AF, de l'adresse multimédia initialement acheminée dans le message d'offre SDP par l'adresse de domaine local, puis l'envoi du message d'offre SDP.
EP08757722.7A 2007-06-15 2008-06-13 Procédé, entité et système pour effectuer un transfert d'adresse de réseau Active EP2120465B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN200710118990 2007-06-15
CN2007101301716A CN101325543B (zh) 2007-06-15 2007-07-20 一种实现网络地址转换的方法、实体及系统
PCT/CN2008/071311 WO2008154850A1 (fr) 2007-06-15 2008-06-13 Procédé, entité et système pour effectuer un transfert d'adresse de réseau

Publications (3)

Publication Number Publication Date
EP2120465A1 EP2120465A1 (fr) 2009-11-18
EP2120465A4 EP2120465A4 (fr) 2010-03-03
EP2120465B1 true EP2120465B1 (fr) 2014-04-23

Family

ID=40155908

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08757722.7A Active EP2120465B1 (fr) 2007-06-15 2008-06-13 Procédé, entité et système pour effectuer un transfert d'adresse de réseau

Country Status (4)

Country Link
US (1) US20100023998A1 (fr)
EP (1) EP2120465B1 (fr)
CN (1) CN101325543B (fr)
WO (1) WO2008154850A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101771733B (zh) * 2010-01-18 2013-11-20 中国联合网络通信集团有限公司 一种地址转换方法与装置
CN102158562A (zh) * 2010-02-11 2011-08-17 中兴通讯股份有限公司 一种下发pcc策略信息的方法及系统
ES2668796T3 (es) * 2011-11-02 2018-05-22 Nokia Solutions And Networks Oy Método y aparato para indicar un tipo de una interfaz de red
CN104363573B (zh) * 2014-10-28 2017-12-22 北京邮电大学 一种利用本地疏导的VoLTE国际漫游系统实现的通信方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060013192A1 (en) * 2004-07-16 2006-01-19 Nokia Corporation Obtaining and notifying middle box information

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004328029A (ja) * 2003-04-21 2004-11-18 Nec Corp ネットワークアクセスシステム
GB0326160D0 (en) * 2003-11-08 2003-12-17 Marconi Comm Ltd Call set-up systems
CN100463387C (zh) * 2004-08-13 2009-02-18 中兴通讯股份有限公司 一种采用ip通讯方式的保护倒换协议的实现装置及其方法
CN1604589A (zh) * 2004-10-28 2005-04-06 无锡三通科技有限公司 支持会话启动协议穿越的防火墙实现方法
CN100442921C (zh) * 2005-04-20 2008-12-10 华为技术有限公司 一种域间互通的方法及其通信网络
GB0508847D0 (en) * 2005-04-29 2005-06-08 Nokia Corp A network
CN100450083C (zh) * 2005-07-05 2009-01-07 华为技术有限公司 媒体流转换地址分配方法及其媒体流转发方法
CA2616417C (fr) * 2005-08-22 2016-02-09 Telefonaktiebolaget L M Ericsson (Publ) Procede et installation pour l'etablissement de session de communications multimedia
DE102006022046B4 (de) * 2006-05-05 2008-06-12 Nokia Siemens Networks Gmbh & Co.Kg Verfahren zum Ermöglichen einer Steuerung der Dienstqualität und/oder der Dienstvergebührung bei Telekommunikationsdiensten
US11496598B2 (en) * 2006-12-11 2022-11-08 International Business Machines Corporation Caching data at network processing nodes based on device location

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060013192A1 (en) * 2004-07-16 2006-01-19 Nokia Corporation Obtaining and notifying middle box information

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); NGN Functional Architecture Release 1; ETSI ES 282 001", IEEE, LIS, SOPHIA ANTIPOLIS CEDEX, FRANCE, vol. TISPAN, no. V1.1.1, 1 August 2005 (2005-08-01), XP014031749, ISSN: 0000-0001 *

Also Published As

Publication number Publication date
US20100023998A1 (en) 2010-01-28
CN101325543B (zh) 2011-04-06
WO2008154850A1 (fr) 2008-12-24
CN101325543A (zh) 2008-12-17
EP2120465A4 (fr) 2010-03-03
EP2120465A1 (fr) 2009-11-18

Similar Documents

Publication Publication Date Title
US9967348B2 (en) Methods and apparatus for providing session policy during a registration of a device
KR100804291B1 (ko) Ｉｐ 어드레스 바인딩들에 기초한 멀티미디어 트래픽의필터링 방법 및 시스템
KR101280281B1 (ko) 일련의 경계 게이트웨이들을 통하는 ｉｐ 멀티미디어 베어러 경로 최적화를 위한 개선된 방법 및 시스템
KR101089907B1 (ko) 차세대 네트워크에서 ｎｏｎ-ｓｉｐ 스피커들에 게이트웨이 프록시들을 서비스하는 방법
US20070053361A1 (en) Method and an apparatus for resource admission control process
EP3082318A1 (fr) Procedé de communication et dispositif pour prévenir le rétrobouclage d'un flux média
JP2008538876A (ja) ネットワーク
JP2008538876A5 (fr)
KR100928247B1 (ko) 통신 네트워크들 간의 보안 통신을 제공하기 위한 방법 및시스템
EP2120465B1 (fr) Procédé, entité et système pour effectuer un transfert d'adresse de réseau
EP2490382B1 (fr) Procédé pour une intercommunication entre un utilisateur de réseau privé et un réseau avec garantie QOS
WO2008084306A2 (fr) Interfonctionnement d'une politique et d'un contrôle de tarification, et traducteur d'adresses de réseau
US20100046422A1 (en) Operation indication method, device and system
Massner et al. Sip trunking-general requirements for interconnecting enterprise networks
Kawashima et al. Architecture for broadband and mobile VPN over NGN
Lehtinen Department of Electrical and Communications Engineering Networking Laboratory

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20090930

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

A4 Supplementary search report drawn up and despatched

Effective date: 20100129

RIC1 Information provided on ipc code assigned before grant

Ipc: H04L 29/06 20060101AFI20100125BHEP

Ipc: H04L 29/12 20060101ALI20100125BHEP

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20130107

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20131105

RIN1 Information on inventor provided before grant (corrected)

Inventor name: ZOU, TING

Inventor name: ZHENG, ZHENJIAN

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 664382

Country of ref document: AT

Kind code of ref document: T

Effective date: 20140515

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602008031722

Country of ref document: DE

Effective date: 20140612

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 664382

Country of ref document: AT

Kind code of ref document: T

Effective date: 20140423

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20140423

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140723

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140423

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140724

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140423

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140423

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140423

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140723

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140823

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140423

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140423

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140423

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140423

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140423

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140423

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140825

REG Reference to a national code

Ref country code: DE

Ref legal event code: R026

Ref document number: 602008031722

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140423

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140423

Ref country code: BE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140423

Ref country code: LU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140613

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140423

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140423

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140423

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140423

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PLAX Notice of opposition and request to file observation + time limit sent

Free format text: ORIGINAL CODE: EPIDOSNOBS2

26 Opposition filed

Opponent name: JAMES POOLE LIMITED

Effective date: 20150123

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140423

REG Reference to a national code

Ref country code: DE

Ref legal event code: R026

Ref document number: 602008031722

Country of ref document: DE

Effective date: 20150123

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140613

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140630

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140630

PLAF Information modified related to communication of a notice of opposition and request to file observations + time limit

Free format text: ORIGINAL CODE: EPIDOSCOBS2

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140423

PLBB Reply of patent proprietor to notice(s) of opposition received

Free format text: ORIGINAL CODE: EPIDOSNOBS3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140423

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140423

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20080613

PLAG Information modified related to despatch of communication that opposition is rejected

Free format text: ORIGINAL CODE: EPIDOSCREJ1

PLCK Communication despatched that opposition was rejected

Free format text: ORIGINAL CODE: EPIDOSNREJ1

PLAE Information related to rejection of opposition modified

Free format text: ORIGINAL CODE: 0009299REJO

REG Reference to a national code

Ref country code: DE

Ref legal event code: R100

Ref document number: 602008031722

Country of ref document: DE

D27O Information related to the rejection of opposition deleted
PLBN Opposition rejected

Free format text: ORIGINAL CODE: 0009273

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: OPPOSITION REJECTED

27O Opposition rejected

Effective date: 20170122

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 10

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 11

REG Reference to a national code

Ref country code: DE

Ref legal event code: R079

Ref document number: 602008031722

Country of ref document: DE

Free format text: PREVIOUS MAIN CLASS: H04L0029060000

Ipc: H04L0065000000

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20220506

Year of fee payment: 15

Ref country code: FR

Payment date: 20220510

Year of fee payment: 15

Ref country code: DE

Payment date: 20220505

Year of fee payment: 15

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602008031722

Country of ref document: DE

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20230613

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20240103

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230613